Lifetime Aluminum Metal Roofing for the U.S. & Canada
Never Re-Roof Again.®
Interlock® designs and manufactures premium interlocking aluminum metal roofing systems — installed by certified local installers across the United States and Canada since 1998. Every roof features the Alunar® Coating System, UL 2218 Class 4 impact resistance, and a transferable 50-year limited warranty — with a Class A fire rating available.
Engineered for where you live — Alaska to Florida, Vancouver to Halifax
Energy-efficient colors with 0.84 thermal emissivity. Cool Roof IR-reflective pigments in the Alunar® coating reflect heat asphalt absorbs — cutting attic temperatures and summer cooling costs by up to 25%.
Energy-efficient roofing →Warranted to resist wind speeds up to 120 mph (193 km/h) when installed to spec, with panels that interlock on all four sides. Florida Product Approval FL7263-R7, tested to UL 580 / TAS 125 wind uplift standards.
See Testing Reports →Aluminum contains no iron — it cannot rust, and its oxide layer self-heals when scratched. The Alunar® PVDF finish is applied to both sides of every panel for extra protection in salt air, where many steel warranties exclude coverage.
Why aluminum doesn’t rust →The highest impact rating available — panels withstand a 2-inch steel ball dropped from 20 feet. The Guardian Warranty even covers perforation from hailstones up to 1.5 inches. Ask your insurer about impact-rated roof discounts.
Hail-resistant roofing →Aluminum doesn’t crack, split, or lose impact resistance through freeze-thaw cycling. Four-way interlocked panels shed snow and resist ice damming — the same construction selected for a research station in Antarctica.
WinterLock cold-weather roofing →Five Architectural Profiles. One Lifetime System.
Choose from five architectural profiles — Slate, Cedar Shingle, Shake, Mediterranean Tile, and Standing Seam — each interlocking on all four sides for wind resistance and installing over most existing roofs. Every profile comes in heavy-gauge aluminum, with solid copper available as an optional material.
Three Steps to Your Last Roof
- Free assessment
A local certified Interlock installer measures your roof and provides a free, no-obligation quote.
- Factory-made for your roof
Your panels are custom-manufactured in the exact profile and color you choose.
- Installed over most existing roofs
Certified installation crews install the interlocking system — usually with no tear-off going to landfill.
Engineered Numbers, Not Promises
Every claim below is published, third-party verified, and linked to its source — the way it should be.
- Lifetime Warranty
A lifetime limited, 50-year transferable warranty — most homeowners install an Interlock roof once and never roof again.
Guardian Lifetime Warranty - UL 2218 Class 4
The highest impact rating available: panels withstand a 2-inch steel ball dropped from 20 feet — a test simulating large hail.
Impact testing reports - 120 mph / 193 km/h
Warranted to resist wind speeds of up to 120 mph when installed to spec — with Florida Product Approval FL7263 for code-tested wind uplift.
The Guardian Warranty - Up to 25% cooler
Energy-efficient cool-roof colors with 0.84 thermal emissivity — IR-reflective pigments can cut attic temperatures and summer cooling costs by up to 25%.
CRRC listing - ESR-1790
ICC-ES evaluated to the International Building and Residential Codes — fire classification, wind uplift, and weather resistance, recognized since 2009.
ICC Evaluation Service - ~95% recyclable
Heavy-gauge, rust-proof aluminum with largely recycled content — fully recyclable again at end of life, ending the asphalt tear-off landfill cycle.
Environmental responsibility
Watch Real Interlock® Installations
Drone tours of completed aluminum slate roofs across British Columbia — coastal, wildfire-zone, and heritage homes.
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Recent Installations Across North America
Original photography from real Interlock projects — browse the full photo gallery.
What Homeowners Say
8,549 verified customer reviews — read them all.
★★★★★
From start to finish Interlock Roofing exceeded our expectations. We have a steep roof with dormers/intricate angles and many roofers denied the job. We felt completely confident t…
Read full review →★★★★★
Our contract with Interlock dates back to July 17/01. Ken was the first company representative that listened to us and promised to solve the leakage. His dedication to fixing the…
Read full review →★★★★★
Tyngsborough, MA has cold, snowy winters with regular freeze–thaw cycles that increase the risk of ice dams and require proper snow guards and durable flashing. Annual precipitation (rain + snow) is roughly 47 inches, and Nor'easters can create heavy snow loads and wind-driven moisture that affect roofing performance. Excerpt: Happy with the Metal Shingles product and installers from Interlock Metal Roofing (New England) Inc. in Tyngsborough, MA, but frustrated by poor communication and an unclear contract—no homeowner plan was provided to confirm shingle placement, snow guard locations, or work on bay windows and the front porch. The crew installed only three snow guards instead of the ten shown in my expectations, and scheduling/notification failures began with the salesperson; despite this, the roof looks good so far. Clearer written plans and explicit contract details (materials, snow guards, exact roof areas) would prevent miscommunication and better protect against New England’s heavy snow loads and freeze–thaw issues.
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Meet Us at an Upcoming Event
Talk to the Interlock team in person — see panels, colors, and warranty details at a show near you. All events & home shows.
Frequently Asked Questions
Direct answers to the questions homeowners ask most.
How long does an Interlock metal roof last?
An Interlock roof is engineered as a lifetime system — designed for 50+ years of service and backed by a transferable 50-year limited warranty. Most homeowners never roof again.
How much does an Interlock metal roofing system cost?
Pricing depends on your roof’s size, pitch, complexity, and the profile and color you choose. An Interlock roof costs more upfront than asphalt but never needs replacing — paying for itself through decades of zero re-roofing costs and lower energy bills. Request a free, no-obligation quote for exact pricing.
Is the warranty transferable if I sell my home?
Yes. Every Interlock roof includes a 50-year limited material warranty that transfers to the new owner — a documented selling point when your home goes to market.
Do Interlock metal roofs protect against hail?
Yes. Interlock systems carry the UL 2218 Class 4 impact rating — the highest hail-resistance rating available — withstanding a 2-inch steel ball dropped from 20 feet without cracking or splitting.
Are metal roofs hot in summer?
No — the opposite. The Alunar® Coating System uses Cool Roof ceramic IR-reflective pigments that reflect solar energy, and Interlock roofs are CRRC rated, helping reduce attic temperatures and summer cooling costs by up to 25%.
Are metal roofs loud when it rains?
No. Interlock roofs install over your existing deck and underlayment, so rain noise is comparable to — often quieter than — an asphalt roof.
Does metal roofing work in extreme cold and heavy snow?
Yes. Aluminum doesn’t crack, split, or lose impact resistance through freeze-thaw cycling, and the interlocked panels shed snow and resist ice damming. The same Interlock aluminum construction was selected for a research station in Antarctica.
Is Interlock approved for Florida building codes?
Yes. Interlock systems carry Florida Product Approval FL7263-R7 under the Florida Building Code, are tested to UL 580 / TAS 125 wind uplift standards, and are warranted to resist wind speeds up to 120 mph.
Explore Interlock®
Proven in AntarcticaThe same aluminum system, selected for the harshest climate on Earth.
Service AreasFind your local certified installer — 14,051 areas across the U.S. and Canada.
Photo Gallery1,719 installation photos — filter by profile, color, home style, and location.- Customer Reviews8,549 verified reviews from homeowners across North America.
- Glossary & Education Center224 roofing terms explained in plain language — the deepest glossary in the industry.
- Knowledge BaseExpert-reviewed homeowner guides — costs, myths, and climate performance.
Talk to a roofing specialist
Family-owned North American manufacturer — serving homeowners since 1998.
Toll-free 1-866-733-5811 · 100,000+ installations across the U.S. and Canada.